The number 15535
15535 is a composite number with 8 divisors. Its prime factorisation is 5 × 13 × 239. Divisors (8): 1, 5, 13, 65, 239, 1195, 3107, 15535.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
15535 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
15535 is composite. Its prime factorisation is
- 3
The divisors add up to 20160; without 15535 itself that is 4625, so 15535 is deficient (4625 is less than 15535). Euler's totient φ(15535) = 11424 numbers up to 15535 share no factor with it.
- 4
The digits of 15535 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 115 steps to reach 1.
LaTeX source of the formulas on this page
\[ 15535 = 5 \times 13 \times 239 \]
15535 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 20160 |
| Euler totient φ(n) | 11424 |
| Square | 241336225 |
| Cube | 3749158255375 |
| Square root | 124.639480 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 115 |
| Scientific notation | 1.5535 × |
15535 in other forms
| Form | Value |
|---|---|
| In words | fifteen thousand five hundred and thirty-five |
| Binary (base 2) | 11110010101111 |
| Octal (base 8) | 36257 |
| Hexadecimal (base 16) | 3CAF |
| Base 3 | 210022101 |
| As time | 15535 seconds = 4 h 18 min 55 s |
Is 15535 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (15535 ÷ 5 = 3107) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 1) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 5) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 3) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 15535 a prime number?
No. 15535 = 5 × 13 × 239, so it is divisible by 5.
What are the factors of 15535?
1, 5, 13, 65, 239, 1195, 3107, 15535.
What is 15535 in binary?
11110010101111 (hexadecimal 3CAF, octal 36257).
What is the square root of 15535?
About 124.6395.
Is 15535 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 15535?
It is a composite number with 8 divisors.